Control device



April 7, 1953 J. E. MORROW ET'AL 2,633,913

CONTROL DEVICE 8 Sheets-Sheet 1 Filed Jan. 3, 1950 Jnven fora James ;E.MOIPOW and Marion T. Edwards April 7, 1953 J. E. MORROW ET AL 2,633,913

CONTROL DEVICE Filed Jan. 5, 1950 8 Sheets-Sheet 2 Inven Mrs L James EMorrow cmd Marion :1? 5a Wards %I;M.Q@ 1 2. w

April 7, 1953 J. E. MORROW ETAL 2,633,913

CONTROL DEVICE Filed Jan. 3, 1950 8 Sheets-Sheet I5 HIM...

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CONTROL DEVICE Filed Jan. 25, 1950 8 Sheets-Sheet 5 o/ o 208 2 202 2 a 204 205 206 m 20' E 5 m7 a /9/ I2 /13 H4 )9: I96

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Inven Mrs as James EMorrow and /57 Marion T. Edwards April 7, 1953 J. E. MORROW ET AL CONTROL DEVICE 8 Sheets-Sheet 6 Filed Jan. 3, 1950 A A AAAA Inven fora James E.Morrow and Marion T Edwards NE W Mum \A April 1953 J. E. MORROW ET AL 2,633,913

CONTROL DEVICE Filed Jan. 5, 1950 8 Sheets-Sheet '7 v I 00 N April 7, 1953 J. E. MORROW ET AL 2,633,913

CONTROL. DEVICE Filed Jan. 3, 1950 8 Sheets-Sheet 8 Fig. 12. 2

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Patented Apr. 7, 1953 CONTROL DEVICE James E. Morrow and Marion '1. Edwards, Portland, Oreg.

Application January 3, 1950, Serial No. 136,438

7 Claims. (Cl. 161-1) The present invention relates to a control device for controlling the operation of a responsive device in accordance with a preselected schedule.

The control device of the present invention is particularly applicable to the control of the tuning mechanism of a radio, being adapted to tune the radio at prescribed times so that preselected radio programs will be received. Although our invention is described herein with particular reference to this application, it also is adaptable to other applications such as the timing of devices other than radios, the control of one or more electric circuits, the operation of a plurality of electric signs or signals, and the like.

It is a primary object of our control device to provide means for selecting and actuating any One of a plurality of electric circuits at predetermined time intervals.

It is another object of our invention to control the operation of a radio set automatically so that preselected programs may be tuned in at selected intervals durin the 24-hour day, the program schedule repeating itself automatically from day to day unless changed.

It is another object of our invention to provide a control device for actuating any one of a plurality of electric circuits at predetermined time intervals which may be set rapidly and easily to follow the desired schedule.

Still another object of our invention is the provision of a control device for actuating any one of several electric circuits at predetermined time intervals which may be set to follow a certain schedule while in operation, Without disturbing the particular operation being performed. When the invention is applied to a radio, for example, the schedule of radio programs may be set up for the desired period while the radio is tuned to a selected station without interfering with the program being received.

It is another object of our invention to provide a control device for actuating any one of several electric circuits at predetermined time intervals according to a time schedule which may be adiusted rapidly and easily to change any one of the elements in the schedule without aifecting the others. When the invention is applied to the opeartion of a radio, for example, any selected program on the schedule may be cancelled or changed without disturbing the rest of the schedule or afiecting the operation of the radio while the change is being made.

It is still another object of our invention to provide a control device for actuating any one of several electric circuits at intervals according to a predetermined schedule in which device means are provided for cancelling simultaneously all of the control elements thereby permitting setting up a new schedule easily and rapidly.

Another object of our invention is the provision of a control device which will turn off the controlled mechanism as well as change its setting at any predetermined time interval. For example, when applied to a radio, the presently described device will turn off the radio automatically during the periods for which no program has been selected, and then will turn it on again automatically when it is desired to tune in a given program.

Still a further object of our invention is the provision of a control device which is simple in construction and operation, and which, when applied to the control of a radio, may be applied either in the construction of new radio units, or adapted for application to radio units already in use.

The manner in which the foregoing and other objects of our invention are accomplished will be apparent from the following specification and claims considered together with the accompanying drawings wherein:

Figure 1 is a plan view of the control device of our invention, partly broken away better to show the construction;

Figure 2 is a sectional view in elevation taken along the line 2-2 of Figure 1;

Figure 3 is a view in elevation of the control panel indicating the elements used for setting and adjusting the device;

Figure 4 is a View in elevation of the control device of our invention with the front panel removed, illustrating particularly the means employed for operating the selecting mechanism;

Figure 5 is a side view in elevation of the control device of our invention illustrating further the means employed for operating the selecting mechanism;

Figure 6 is a view taken along the lines 6-45 of Fig. 1, and illustrating particularly the driving mechanism of our control device;

Figure '7 is a wiring diagram illustrating the electric circuit by means of which the control device of our invention is operated;

Figure 8 is a, fragmentary view in section of an alternate construction of the selecting mechanism which may be used in the control device of our invention taken along lines 88 of Figure 10;

Figure 9 is a view in elevation illustrating means for operating the selecting mechanism of Figure 8;

Figure 10 is a plan view of the selecting mechanism of Figure 8;

Figure 11 is a sectional view taken along the lines ii-H of Figure 10;

Figure 12 is a fragmentary, perspective view showing still another embodiment of a selecting mechanism which may be employed in the construction of our control device;

Figure 13 is a detail view of one of the elements comprising the embodiment of Figure 12, taken along the lines i 3-13 of Fig. 12;

Figure 14 is a fragmentary sectional view illustrating still another embodiment of the selecting mechanism employed in the control device of our invention;

Figure 15 is a sectional View further illustrating the construction of the embodiment of Figure 14;

Figure 16 is a plan view still further illustrating the construction of the embodiment of Figure 14;

Figure 1'7 is a wiring diagram indicating the electric circuit employed in the operation of the embodiment of Figures 1a, 15 and 16'; and

Figure 18 is a detail view of an alternate type of selecting element which may be used in the construction of our control device.

Generally stated, the control device of the present invention comprises a central body member. preferably a drum, having in the surface thereof a plurality of guideways aligned with the axis of the drum. In each of the guideways is mounted slidably a key, this being an elongated member longer than the drum and projecting outwardly therefrom on one or both sides, depending upon its position. On the exposed surface or the key are one or more irregularities, which may be either depressions or projections.

The drum is mounted rotatably in a suitable framework so that the keys may be presented one at a time to a given station. At this station are positioned a plurality of electric contact units, each comprising a pair of contact points placed adjacent the drum. Between the drum and each of the contact units is placed a pin which is held in contact with the surface of the drum by suitable means. The pins are slidably mounted in such a manner that, as the drum revolves, they move responsively to the surface irregularities on the keys, moving inwardly if these comprise recesses, and moving outwardly if they comprise projections. Whether moved inwardly or outwardly with respect to the drum, the pins actuate the contact units, either making or breaking contact depending upon the arrangement of the contact points comprising the contact unit. Each of the contact units is incorporated in one of the electric circuits which it is desired to control. Hence by setting the keys in the drum in a prearranged position with respect to the contact units, the latter may be operated alternately as the drum rotates.

A suitable driving mechanism is provided for rotating the drum. This comprises a motor actuated at intervals by means of a clock. The motor drives suitable power transmission means which, in turn, operates a mechanism for rotating the drum in stages corresponding to the spacing between the keys thereon.

Associated with the power transmission means is means for turning cli the motor when the desired position of the drum has been reached, the motor remaining turned off until again set in motion when the clock has reached a given setting. In this manner, there are presented successively to the contact units each of the keys in the drum, which then actuate one or" the contact units, the unit operated depending upon the position of the key on the drum. Any one of several electric circuits may be energized in this manner at predetermined time intervals and, when it is desired to tune a radio, the circuit may be employed to tune the radio to a selected one of several stations.

The setting of the keys on the drum is accomplished by means of a pair of arms which engage the opposite ends of the keys one at a time and move them to desired positions. The arms move in opposite directions to each other and are operated by an appropriately arranged system of levers. Abutting one of the levers there may be a variable position stop, the setting of which determines the final position of the two Hence by setting the stop, it is possible to bring the arms to rest at any one of several final positions, and hence to set the key engaged by the arms in a corresponding position.

The construction and operation of our control device now will be described more specifically with reference to the drawings and the several embodiments illustrated therein.

1. THE SELECTING MECHANISM As is shown particularly in Figures 1 to 5, the selecting mechanism is mounted in a suitable housing or framework Hi. It comprises a drum ii mounted rotatably in the frame by means of the shaft i2 journalled in openings in the frame. The drum preferably is hollow and open at its ends, there being provided on one end plate l 3 bolted to the drum and having attached there to the collar id provided with set screw it. The latter attaches the drum rigidly to the shaft so that it turns with the latter. On the other end of the drum is the plate is which corresponds to plate i 3 and is attached to the shaft through collar ii.

The drum I I is made of any suitable constructional material such as brass. It has milled or otherwise formed in its surface a plurality of parallel grooves 26. These extend in a direction parallel to the axis of the drum and are spaced apart from each other by a suitable distance, depending upon how many intervals of time are to be controlled by the device. Where the latter is applied to the tuning of a radio, itis convenient to divide the day into 15-minute intervals, and there correspondingly are provided in the drum 96 spaced grooves, each one corresponding to a single fifteen-minute period.

The grooves in the drum serve the function of guideways for the keys 2! which are the elementsprimarilyconcernedintheselecting'mechanism. Each key comprises an elongated member proportioned so that it slides freely within the groove in which it is contained and extends outwardly from the drum on one or both sides depending upon its position relative thereto. In the construction in which 96 grooves are provided in the drum, there will, of course, be 96 keys, one being placed in each of the grooves.

On the outer surface of each of the keys as it nests within its respective groove there are one or more irregularities which, in the embodiment illustrated, comprise recesses 22. These are adapted to cooperate with pins which, in turn, actuate contact units in a manner to be more fully described hereinafter. Hence the recesses are located on the key in positions such that a convenient longitudinal adjustment of the key will bring one of the recesses in registry with a selected one of the pins.

Means are provided for holding the keys 2i under a slight tension within the grooves in the drum. To this end there may be provided the flanges 24, on the ends of the drum. In each flange there are a plurality of transverse grooves which register with the grooves on the body of the drum to form continuous channels in which the keys are received. There also are peripheral channels 26, 27, the bottom surfaces of which are at a plane somewhat below the plane of the upper surfaces of the keys as they seat in the grooves. Resilient members such as the springs 28, 29 then are placed within the peripheral channels in the flanges and adjusted to exert a slight pressure against the upper surfaces of the keys. In this manner the latter are maintained within the groovesand prevented from moving laterally, without preventing their longitudinal movement. The resilient holding members serve the additional function of maintaining the keys in whatever position they may be set, thus keeping them in proper adjustment until it is desired to change their setting by moving them to a new position.

Means also are provided for moving the keys longitudinally of the drum and to set them in any one of several predetermined stations. In the embodiment illustrated, such means comprise a pair of arms 32, 33 which move in opposite directions and are adapted to engage the ends of the key opposite the follower pins and to move r it to its new position. The desired selective movement is obtained by means of a system of lever arms associated with a variable position stop. Adjustment of the stop to any one of its several positions permits the movement of the a lever arms in varying degree, thereby pcsitioning the arms and the key engaged thereby in the selected station.

Thus as is shown particularly in Figures 1, 4 and 5, the lever system for setting the keys is operated through a shaft 35 journalled in a supporting bracket 36 attached to the side of the frame. The arm 33 is pivotally mounted on the end of the shaft and carries as an extension at its outer extremity the positioning pin 3'? pivotally connected to the arm through the pin The positioning pin 3': penetrates a perforation in the side of the frame, extending inwardly until it is just flush with the inner surface of the housing. It is the member making actual contact with the keys on the drum.

A collar 39 is rigidly attached to the shaft by means of the set screw 43. The latter extends outwardly above the surface of the collar a sufficient distance to engage the arm 33 and hence to move the same and the positioning pin which it carries. The set screw dd is spaced apart from the arm when the selecting mechanism is at rest so that a substantial rotation of the shaft 35 is permitted before the arm 33 is engaged by the set screw. This makes possible the adjustment of the position of the arm on the opposite side of the drum to various positions before the movement of the arm 33 is initiated.

To return the arm 33 to its normal position of ment of the shaft 35. Rigidly attached to the latter is a collar 45 on which pivotally is mounted the lever arm 46 through the screw 41. The lever arm 46 is attached pivotally to the lever arm 48 through the screw 49, and the lever arm #8, in turn, is attached pivotally to the lever arm 50 through the screw 5|. The lever arm 50 is supported by the frame of the unit through the screw 52. In this manner, the lever arms 48 and 53 form a floating pivot which moves back and forth with the longitudinal movement of the lever arm 46.

The lever arm 48 is connected pivotally to a connecting link 54 through the screw 55, while the connecting link is attached to the terminal portion of the arm 32 through the screw 56. The arm 32 is pivotally mounted on the bracket 5! attached to the frame of the unit, the attachment being through the pin 58. This manner of mounting the arm 32 changes the direction of motion of the inner terminal portion thereof so that it moves in a direction opposite to the direction of motion of the pin 31 on the opposed arm 33.

Means also are provided for maintaining the above described lever system in a given position of rest and for returning it to this position after displacement therefrom by rotation of the shaft 35. Such means may comprise springs 60 and 6!, the former interconnecting the arm 32 and the frame of the unit, and the latter connecting one of the lever arms, arm 46 for example, and the frame. These springs cooperate with the spring M which engages the arm 33 as hereinabove explained.

As indicated above, the degree of movement of the lever arm system is controlled by means of a variable position stop associated therewith (Figure 4). This element may comprise a member 65 of irregular outline attached rigidly and eccentrically to the shaft 86 which is mounted rotatably onthe frame of the unit. In the embodiment illustrated, the variable position stop has a plurality of faces meeting each other at slight angles, these faces being indicated at 61, 68, 69, 73, II and 12. In addition, there is a lobe 13 at the position of farthest displacement from the shaft 66.

Rigidly attached to the same shaft as the variable position stop 35 is the ratchet '15 with which is associated a spring pawl '58. The notches on the ratchet are spaced in a manner to correspond with the numbered surfaces on the variable position stop and hence afford a means of presenting the latter in succession accurately to a given position.

A means of contact between the lever system and the variable position stop is afforded through the extension H on the lever arm 50. As the latter oscillates about the pin 52, the extension I! will move toward and away from the variable position stop. The extent of its displacement will be determined by which face of the stop is most closely adjacent to it. This, in turn, will determine the final positions of the arms 32, .53.

Hence. to set the keys in the drum. the variable position top 65 first is turned to a selected position. When the shaft 35 is rotated in a counterclockwise direction, the collars 39 and '35 will rotate therewith. During the first interval of rotation the collar 33 will move freely without contacting the arm 33. During this interval, however, the lever system comprising the lever arms 46, 48, and 53 and the connecting link 53 will actuate the arm 32, this being moved until the extension ll on the lever arm 50 engages the surface of the variable position stop which is opposed to it. After a delay determined by the distance between the set screw 49 and the arm 33, the former will engage the latter and move it together with the pin 31 in a direction opposite the direction of motion of the arm 32. In this manner, the arms engage the ends of the key opposite them in the drum and slide it longitudinally in the groove in which it seats until it comes to rest in a position determined by the variable position stop. Thus by varying the position of the latter, the key may be caused to come to rest in any one of several selected locations or stations.

Associated with the drum and the selecting mechanism are means for rotating the drum in accordance with a predetermined time schedule. Such means in the embodiment illustrated comprise an indicator dial 60 which is securely affixed to the shaft l2 by means of collar 3i and which may be operated by means of the handle 82. The indicatin dial preferably is a cylindrical member having on its periphery markings corresponding to the recesses or guideways in the drum. Where, as described hereinabove, the drum has in its surface 96 recesses, one for each fifteenminute period during a twenty-four-hour day, the indicator dial may be marked off in hours and quarter hours, each marking corresponding to a given recess in the drum and the key which it contains. Thus by turning the indicating dial one marking at a time, setting the variable position stop and rotating the shaft 35 at each posi tion of the indicating dial, the keys in the drum may all be set to conform to the desired schedule.

When the presently described device is applied to the control of a radio, the controls for the selecting mechanism described above may be arranged as indicated in Figure 3. Thus in a face panel 8 5, there may be the handle 85 with attached indicator point for manipulating the variable position stop 65, being aiiixed to the shaft 65 to which the stop also is amxed. Grouped around the handle 85 are the points 8'! to 92, inclusive, these being spaced to correspond to the faces 12 to 57, inclusive, of the variable position stop. An appropriate legend may be placed near each one of the points 87 to 92, as to identify the radio station corresponding to that particular point.

In addition there may be present on the face panel the control handle Q which is rigidly fastened to the shaft 35 and used to rotate the same. Still further, there may be present a clock 96 used in controlling the device, and various other controls the purposes of which will appear hereinafter.

2. CANCELLING MECHANISME We also have provided means in the control device of our invention for returning the keys in the drum to positions where they turn off the responsive device, i. e. to cancel them, when this is desired. They may be cancelled individually, as when it is desired to cut out or eliminate a single radio program at a given time period without disturbing the rest of the schedule. Alternative- 13', all the keys may be cancelled simultaneously, thereby rendering the entire mechanism inactive, as when it is desired to set up an entirely different schedule.

To make possible the cancellation of a selected one of the keys Without disturbing the others, there is provided on the variable position stop a surface 72 proportioned and spaced from the contact arm Ti in such a manner that the arms 32 and 33 will come to rest upon rotating the shaft 35 with the key which they engage in an inoperative position on the drum. In the embodiment illustrated particularly in Figure 2, this will be the position of maximum displacement toward the right. In this manner, it is easily possible to cancel any one or a number of selected keys by setting the handle 35 until the pointer thereon is at cancelling position 8?, setting the indicator dial 8i and turning the handle to actuate the arms 32, :25. This sequence may be repeated as often as necessary to cancel the desired keys.

To make possible cancelling all of the keys in a single operation, there is provided a contact member 98 preferably in the form of a disc having a diameter substantially equal to the diameter of the drum. The disc 98 is slidably mounted on the shaft l2 through the collar 99. A crank Hill is employed to move the cancelling disc on the shaft, the handle it! secured to the crank being provided for this purpose. There also is provided a spring I32 encircling the shaft i2 and interposed between the drum and the cancelling disc.

-t Will be that turning the crank see results in the displacement of the cancelling disc in the direction of the drum, this being accomplished against the tension of the spring iElZ. As the disc moves toward the drum, it engages the prctru' g en-.s of the keys thereon and slides them in their respective grooves toward the right viewed in the drawings, until they have reached their inoperative positions. At the conclusicn of the operation, the cancelling disc is returned to its original posi ion and maintained there by the action of the spring 552. In this manner, all of the keys may be cancelled rapidly and a new schedule set on the drum.

3. THE DFLVING IVIECHANISM The mechanism whereby the control device of our invention is driven in accordance with a predetermined time schedule comprises a cloclncontrolled motor coupled through suitable power transmission means to means for driving the drum in stages. Switches also are provided for turning the motor on and off periodically.

Thus as is apparent particularly from Figures 6 and 'l, the clock 913 carries on its minute shaft the cam i535 which preferably is a two-lobe earn, the lobes of which are at 18%" from each other. There also are provided the followers 586 and ml, each of these fo- --ing one of the contact points of the electric contact units 38 and Hit. The cam followers preferably are disposed at an angle of 96 to each other. Since the two-lobe cam Hi5 moves through 360 once each hour, it will be apparent that the cam followers will be activated by the lobes on the cam once each 15 minutes, thereby closing one or the other of the contact units at fifteen-minute time intervals.

In an electric circuit with the contact units i6 3 and tilt is an electric motor 9 it which is conheated through a suitable gear :train indicated generally at iii to the shaft 55'... Rigidly affixed to the shaft is a preferably a rate et cam H3 and a single be cam Sit. The latter adapted to engage and actuate the two-Way switch 5 ill, operated. by cam follower i it. Switch lid also is in the electric circuit with he motor and is adapted to turn it off after a pre etermined period of operation.

The ratchet cam. H3 engages the pawl ii'i which is pivotally mounted on the frame of the unit through the pin I I8. The pawl, in turn, drives the notched wheel I28, one notch at a time. The wheel is rigidly affixed to the shaft I2 together with the drum II and therefore drives the latter. The number of notches on the wheel matches the number of grooves on the drum. Hence when the wheel is driven a distance equal to that between two adjacent notches, the drum is moved a distance equal to the space between two adjacent keys. After this movement has been completed, the motor H5 is shut off by means of the switch II5 actuated by the single lobe cam IIfiI. In this manner it is possible to advance the drum in stages, at predetermined time intervals, and to hold it fixed at each stage, the stop IZI being provided for this purpose. The latter preferably is formed as an extension from the shank of the pawl and moves therewith in such a manner as to be disengaged from the notched. wheel as the latter is driven by the pawl. This prevents the emanation of an undesirable clicking sound as the wheel moves from position to position.

i. THE ELECTRIC CIRCUIT The electric circuit employed in the control device of our invention is illustrated in detail in Figure '7. It comprises essentially three separate circuits, i. e. that employed to operate the driving mechanism, that involving the selecting mechanism, and that involving the circuits in the responsive device, e. g. a radio.

In the first of these circuits, namely that employed to operate the driving mechanism, current coming from a central power source is passed through transformer I25 to reduce its voltage and then through the circuit comprising contact units I58, I89, the two-position switch H5, and the motor IItI. When the two-lobe cam driven by the clock is in the position indicated, the contact unit IE8 is closed, thus permitting current to flow through the two-way switch and through the motor, turning the latter on. The motor continues its operation until the single lobe cam IIE driven thereby has moved through 180, thereby actuating the cam follower III; and opening the two-way switch I I5. This breaks the circuit and shuts off the motor.

After a sufficient time interval haspassed so that the clock has turned cam I65 through 95, the cam followers E55 and IIII assume the positions indicated in dotted outline. In this position, the contact unit I08 is broken while unit its is made. Since in this position the cam follower lib also is in its dotted outline position, the circuit will be made through the double contact switch I55 and the motor energized. The latter will operate, driving the notched wheel I and drum I I until the single lobe cam H4 has moved through another 180, whereupon the circuit will be broken at the two-contact switch H5 and the motor turned off. This sequence is repeated at i5-1ninute intervals as long as the clock operates and the control device is connected to a source of electric energy.

Considering now the circuit of the selecting mechanism:

As indicated above, the drum II carries at spaced intervals on its periphery a plurality of elongated keys 2I. Each of the keys has on its outer surface a plurality of spaced recesses 22. As the drum revolves, these recesses are adapted to register with follower pins I35 to I35, inclusive. These are slidably mounted in perforations through the support member I31 attached to the frame of the unit. They are positioned radially with respect to the drum and have rounded ends adapted to be in sliding engagement therewith as it rotates and to nest in any one of the recesses 22 when the latter are in registry therewith. The pins preferably are maintained in sliding contact with the drum under a slight spring tension.

Adjacent the follower pins and electrically insulated therefrom by strips I39 are a plurality of contact units I40 to I45, inclusive, one being positioned above each of the pins. Of these, contact units I40 to I44, inclusive, are normally open and are incorporated in the several circuits which it is desired to energize selectively. Contact I45 is normally closed for a reason which will appear hereinafter.

All of the contact units I40 to I45, inclusive, contain one contact point attached to a resilient member. In contact units I40 to I44, inclusive, the pin associated with each normally exerts a slight pressure against the tension of the resilient contact, thereby holding it open. In contact unit I45, on the other hand, the arrangement of the contact points is such that the pressure exerted by the pin associated therewith holds the contact unit closed against the tension of the resilient member, Therefore, when the follower pins associated with contact units I40 to I44 drop into the recesses in the keys, the pressure is released from the resilient contact member so that it approaches its fixed partner and makes contact therewith, thereby closing the circuit. In the case of contact unit I45, on the other hand, when the pin I35 associated therewith drops into a recess in a key, the release of pressure on the resilient contact point causes its separation from the other contact point of the unit with the result that the circuit is broken.

In the circuit, current is supplied to the line I52 from a transformer I25, when the on-ofi switch I53, automatic switch I74 and the operating switch I54 are closed. Then upon closing any one of contact units I40 to I44, as when the corresponding pin drops into a recess in a key on the drum, the corresponding one of lines A, B, C, D, or E is energized.

The current then travels through the energized line to the responsive unit, preferably through a connector I55. There it energizes a corresponding circuit. Where the responsive device is a radio, it thus may be tuned by incorporating in the radio a motor selector switch I55 which is affixed to a common shaft with a motor or solenoid I51, and a pair of multiple contact switches I58 and I59.

When electric current is introduced into the selector switch I56, this operates in its usual manner through the motor or solenoid I5? to rotate the common shaft I60 on which elements I55 to I59 are mounted until appropriate adjustment has been made, depending upon which of the lines entering the motor selector switch has been energized. This operates to direct the flow of current through corresponding tuning condensers and the radio is thereby tuned to the desired station.

Means also are incorporated in the circuit for turning the responsive device, e. g. the radio on and off by remote control from the control unit. Thus there is included in the circuit a socket which is adapted to connect the radio to the corn trol device, and the relay I66. There also is included the setting switch I59. It will be apparent that, when the on-off switch I53 and the operating switch I54 are closed, the relay will be energized and the radio turned on. However, if either switch is opened, the radio will be turned ofi.

If it is desired to set the presently described control device during the operation of the radio without disturbing the reception of the program, the operating switch i 3 may be opened and the set switch 169 closed, This breaks the circuit in the control unit so that the common lead 152 is deenergized. It makes the circuit through the relay, however, with the result that the radio circuit remains energized and continues to deliver the program of the station to which it is tuned. Then when the setting of the control device has been completed, as by moving certain of the keys to cancel position and setting certain of the others, the set switch 89 may be opened and the operating switch 154! closed. The radio then will deliver the program of the station to which it is tuned in accordance with the setting of the key opposite the follower pins. It will be tuned to other stations at various time intervals in accordance with the setting of the other keys on the drum. In the event that no station has been selected for any particular interval, the radio will be turned off through the operation of contact unit i 55.

Means also are provided for cutting out the control device with the result that the radio or other responsive device may be operated manually. To this end there is incorporated in the circuit the triple contact flexible switch I12. When this is adjusted with the central lead H3 in contact with the contact point lie, current is conducted to the conductor I52 and the selecting mechanism is activated. However, when the contact unit I72 is adjusted to manual position (station ll? of Figure 3 with the central lead H3 out of contact with the contact lit and in contact with the contacts H5 and 116, the line l52 will be dead, but the relay its will remain energized. Motor selector switch I56 also will be energized causing motor 15! to adjust the multiple contact switches I58 and IE9 to their manual positions. Hence the radio will remain on and susceptible to manual-tuning.

5. ALTERNATE consraoo'rroivs (a) Consolidated core Where it is desired to construct the control device of our invention "in relatively small dimensions, as where it is desired to incorporate it in a radio cabinet, this may be'a c'complished by modifying the design in the manner illustrated in Figures 8 to 11, inclusive. In this modification, a short drum is employed and the follower pins are placed closely together. This makes possible the use of'keys which are relatively short and have only one irregularity in the surface thereof, this being movable across the entire space occupied by all of the pins and in this manner cooperating with all of them in selecting the desired electric circuit.

In this embodiment, the drum I80, which may be made of metal, plastic, or other suitable con structional material as above described, has formed in its surface a plurality of parallel, spaced grooves IBI, the spacing of the grooves being such as to provide one groove for each time interval to be controlled by the unit. Within each groove is slidably mounted a key I82 having a recess I83 in its exposed surface; The keys are maintained in the grooves and prevented from lateral displacementby means of springs I84, 185 or other resilient means contained in peripheral recesses in flanges I36, I87 at the ends of the drum. The tension of the springs is sufficient to exert a slight pressure on the keys, preventing their lateral displacement but permitting their longitudinal movement to adjust the position of the recess I83 with respect to the pins.

Stationed adjacent the drum is a support member 99. This member is made of insulating material and is provided with a plurality of closely spaced transverse perforations arranged in a line parallel to the axis of the drum. Disposed within the perforations radially with respect to the drum are a plurality of follower pins l9! to I96, inclu sive. The ends of the follower pins adjacent the drum are rounded and are adapted to engage the surface of the drum as it rotates, and to nest within the recesses in the keys when the recesses are placed in alignment therewith.

The ends of the pins farthest removed from the drum preferably are notched to receive electric conducting wires or bars 28! to 286, inclusive. These are made of spring bronze, beryllium wire or other resilient electric conducting material and are fastened a spaced distance away from the support member I99 at one of their respective ends by suitable means, as by being embedded in a block 287 of insulating material fastened to the, support member by means of the screws 208, 209.

The arrangement of the conducting elements 28] to 206 within the block 2oz is such that they overlie the follower pins 19E to I95, being retained in the recesses therein. They are, however, electrically insulated from the pins, as by means of insulating sleeves Elli. The distance between the conducting elements and the surface of the keys is such that the former are flexed a bit and hence are under a slight tension. Then when the follower pins drop down into a recess in the keys on the drum, the conducting elements move with the pins, this motion being used to make or break an electric circuit.

Attached to one end of each of the electric conductors 28! to 208 is an electric lead, these being indicated at 2!] to 2l6, inclusive. At the other end of the conductors 29! to 266 is a transverse bar 2!? of conducting material which is fastened to the support member I98 and connected to the other side of the line through conductor 218. There also is provided a finger 2I9 overlying the conducting arm 2% and in contact withthe transverse bar 2 ii. The circuit is completed through the finger 2 l9 and bar 2!? through the lead 223. In this manner, there are provided between the electric conductors 28! to 266, the bar 2%! and the finger ElS a plurality of electric contact unitscorresponding to the contact units Mil-Hi5, inclusive, of the previously described embodiment (Figure 7). Of these, the contact units incorporating the conducting elements 2M to 205, inclusive, are normally open, while that formed between the conducting element 206 and the finger 219 is normally closed. Hence as the drum revolves and the follower pins drop .into the recesses on the keys, a circuit is made between the conducting elements 291 to 235 and the bar 2!? where the follower pins m to I are involved, and a circuit is broken when the follower pin 96 drops into a recess on the key. In the former situation, an electric circuit is energized which may be used totune a'radio, and in the latter situation the responsive device, e. g. the radio, is rendered -inoperative pending a subsequent rotation of the drum and the presentation of another key to the following pins.

The adjustment of the keys in the drum of Figures 8 to 11 may be accomplished in the same manner as set forth in the previously described embodiment (Figure 4) by employing a pair of arms operated by a system of levers associated with a variable position stop. Their adjustment also may be effected, however, by the mechanism of Figure 9. As shown therein, the key I82 may be moved longitudinally in its groove in the drum by means of arms 225, 23G adapted to engage its ends and to set it in a predetermined position in the groove at which a selected one of the follower pins l9! to N6 will register with the recess in the key. The arm 225 is pivotally connected to the frame of the unit through the pin 225. It also is pivotally connected at its rear terminal portion to the lever arm 228 through the connecting link 229.

The other key engaging arm 23B is pivotally attached to the frame of the unit through the pin 23!. It also is pivotally connected at its rear terminal portion to the connecting link 232 which, in turn, is pivotally attached to the lever arm 233. The latter is pivotally connected intermediate its ends to the lever arm 228 to which the key engaging arm 225 also is attached. Lever 228 is connected pivotally to the frame of the unit through the pin 234. Lever 233 is pivotally connected at one of its ends to a shaft 235. The latter is mounted for longitudinal movement on the frame of the unit by means of the pin 235 extending through the slot 231. Hence longitudinal movement of the shaft 235 will result in the movement of the key engaging arms 225 and 230 in opposite directions. place against the tension of a spring 238 interconnecting the rear terminal portions of the arm, which therefore will return the latter to their spread apart positions after the release of pressure upon the shaft 235.

As in the case of the previously described embodiment, the final position of the arms 225 and 239 may be determined by means of a variable position stop 238 rotatably mounted on a shaft 235 and suitably positioned to abut against the arm 225, or one of the lever arms by means of which it is operated. As before, the variable position stop has a plurality of faces located at varying positions from the center of rotation of the stop. Where, as in the presently described case, there are six follower pins, there are provided corresponding faces on the variable position stop, one for each of the pins.

In operating the key positioning mechanism of Figure 9, the v position stop first is adjusted to 11 corresponding to the pin which it is desired to activate. Then the shaft 235 is moved longitudinally to the left. By analyzing the operation of the lever system as indicated by the arrows and dotted outline of Figure 9, it will be apparent that the first effect of moving shaft 235 will be to displace the lever arm 22s to the left, and hence the forward end of arm 225 toward the right. This motion continues until the rear portion of arm 225 comes to rest against the variable position stop 238. Further displacement of the shaft 235 then will move the forward portion of arm 238 to the left. During such motion, it will engage the end of the key I32, pushing it to the left until it meets the end of arm 225. The key then will be in its adiusted position with the recess on the same directly opposite the selected follower pin. Upon rotation of the drum, the pin will drop into the recess on the key, thereby energizing the selected Movement will take 14 circuit and tuning the radio, or, in the event that pin is pin 2%, associated with the normally closed contact unit, the effect will be to shut off the circuit and render the responsive device inoperative.

(22) Flexible core Still another means of adapting the control unit of our invention to situations in which the available space is limited is illustrated in Figures 12 and 13. In this embodiment, the entire selecting mechanism is maintained at restricted vertical dimensions so that it may be placed above or below the mechanism which it is to control. Furthermore the core member is flexible, resembling an endless belt in its construction.

In the construction of this embodiment, the core member is comprised of a plurality of key carriers 245. These are elongated members having longitudinal recesses adapted to contain keys The keys employed may have substantially the configurations and dimensions of the keys of the previously described embodiment and have in their outer surfaces a plurality of spaced recesses 2 3 i. Suitable means are provided for retaining the keys in the key carriers, this being accomplished, for example, by means of a friction fit between these two members. As before, the recesses in the key are adapted to receive the ends of follower pin 248 to 253, inclusive.

The key carriers are adapted to fit snugly against each other to present a substantially continuous surface to the exterior. They are linked together by means of extensions 254, 255 having perforations adapted to receive connecting pins. When connected together in this mannor, there is formed a continuous belt or chain made up of a substantial number of the keys and having openings 256 between the connecting pins. These are adapted to receive sprockets 25'! mounted on a shaft 258 which may be turned stepwise to advance the keys one at a time with respect to a station at which the pins 248 to 253, inclusive, are located. During this operation, the pins drop into the recesses energizing a selected circuit in the manner indicated above. In this manner, there is formed a selecting unit which is flat in configuration and suitable for insertion in a narrow space. Because of the flexible construction of the core member, however, it may be adapted for use in spaces of varying shapes.

(0) Conducting core its still an alternate construction, there may be provided a core member or drum which, in addition to carrying the keys, forms an integral part f the electric circuit. Such a construction is illustrated in Figures 14 to 17, inclusive. In this case the drum 255 is made of brass or other electric conducting material. It may be of an suitable shape and dimensions, and has on its surface a plurality of spaced, parallel recesses ex tending in an axial direction and adapted to contain a plurality of keys 266, one key being in each recess. The keys are made of an insulating material and have in their outer surfaces spaced notches adapted to receive follower pins as described above. Such pins, 26'! to 212, inclusive, are provided and made from a conducting material, as by being silver plated. They are fastened to resilient arms 215 to 280, inclusive, one being on the terminal portion of each arm. The resilient arms also are made of conducting material and to each is attached one of the electric conductors 282 to 281, inclusive.

1 The ends of the resilient arms 275 to 280, in

elusive, opposite the follower pins 25'! to 212 are fastened to a support member 29%, the method of fastening being such that the follower pins are held against the drum under slight pressure of the resilient conductors. As the keys 268 seat in their respective grooves on the drum, the upper surfaces thereof are substantially flush with the outer surface of the drum. The lower surface of the recess in the keys is, however, somewhat below the outer surface of the drum. Therefore as the drum revolves stepwise to any one of its positions at which the keys are located directly opposite the pins, the latter will be held out of contact with the drum except when a recess on the key isv in registry with the pin immediately opposite it. In this case, the pin will drop into the. recess and, because of its shape, will come in contact with the drum at the edges oi the grooves t erei'n. This is shown particularly in Figure 15. When such contact is made, the circuit is made through one of the conductors 232 to 2855, inclusive, through one of the connecting conductors H5. to 2'19, inclusive, through the pin attached to that particular conductor, through the body of the drum, and thence to the rest of the circuit.

The circuit. of the embodiments of Figures 14 to 7., inclusive, is set forth detail in Figure 17. As in the embodiment illustrated in Figure 7, current from a suitable power source passes through. line 29! to socket 292 to which the radio may be connected. Also included in this circuit is the switch 2&3. operated by the solenoid 234, this. arrangement making possible the turning of the. radio on and ch" as required by the operation of the control unit.

To operate the latter, current from the power source. reduced in voltage by the transformer 25353 if necessary. passes through on-ofi switch 253 (when closed), and through line 289 to the op crate-set switch Silt. Switch 293 corresponds to switch 553 in Figure 7 and has for its purpose the turning of the control device on and off. The operateeset switch 380 corresponds to switches if l and use of Figure 7 and has for its purpose the adjustment of the control device to normal operating position when contact unit SEI is closed, and to. setting position at which the keys on. the drum maybe;- set when contact unit 3&2 is closed.

When switch 3% is in operate position, current flows through line 3% to switch 3535. The latter has for its purpose the breaking of the circuit through the selector mechanism during the brief interval when the drum is rotating to its successive positions and the follower pins are in contact with the ribs separating the grooves. This hrevents the selector circuit from becoming energized at the times when all the follower pins are in contact with the conducting drum through the ribs thereon.

Switch 355 is operated by means of a projection tiltwhichv engages the two-lobe cam Bill. The latter, in turn, is rigidly afiixed to a common shaft with the ratchet cam; 3&8 which corresponds to ratchet cam H3 of Figure 7 and is used to drive thev pawl by means of which the drum is rotated in stages. When the drum is at rest, the project 365 extends into one of the recesses formed between the two lobes of earn being held there by the tension of one of the contact points in switch 3G5 or other suitable means.

However, when the motor driving the drum the lobes of the latter will displace projection 33% thereby opening switch 385 and de -energizing the selector circuit. Alter cam Sill! has completed its stepwise rotation through 186, proiection will drop into another recess therein, thereby closing switch 365 and rerenergizing the electric circuit.

Current then passes through line 369 to selector drive motor 3 it and the motor selector switch Si 3, both of these units being attached to a common shaft with radio selector switches (not shown) corresponding to switches G58 and l59 of Figure 'l used to tune the radio.

Next the current passes to automatic-manual switch The latter is a multiple contact switch having therein rive contact units M5 toinclusive, adapted to be closed when in automatic position, thereby energizing the circuits between the follower pins and the motor selector switch 3! l, and two contact units 326, 32! adapted to close the circuit employed during manual operation.

When switch SiZ is in automatic position, the current will follow one of conductors 282 to 285, inclusive, and conducting follower pins 261 to all, inclusive, depending upon which of the follower been placed in contact with conducting druzn 255, as by entering a recess in the key in the manner explained above. The circuit then is completed back to the other side of the transformer by rneans of line 322.

- When it is desired to set the selecting mechanism, operate-set switch 3% is adjusted to open contact unit sea and close contact unit 36.2. This lie-energizes the selector circuit but keeps closed the circuit through solenoid 253. The radio or other responsive device therefore remains energized during the setting operation. Thus the curr nt passes from the transformer 2525 through on-off switch 232, through line 82 2, through the solenoid through line 325, through contact unit and thence through line 326, 32?, and 322 to the other side of the transformer.

When it is desired to ope ate the radio or other responsive device manually, the multiple contact switch Bill is set in manual position, thereby opening contact units Bi-Ei to 35$, inclusive, and closing contact units 329', 32L In. this position or switch 3 l 2, current leaving the transformer 235 passes through on-oif switch 298, line 29a, contact unit line and switch see, thence through line 3533, and selector drive motor and switch 325: and 35 i, respectively, and then back to the other side or" the transformer through line 3353, contact unit dill, and lines 327 and 322. At the same time, current passes through a second c cult com ising switch 293, line 324, solenoid line contact unit and lines 32? and thereby maintaining the radio circuit energized.

When it is desired to turn the radio oil for a given time interval, the key corresponding to that interval is set so that pin 212 will dlOp into a recess on the lacy. This will open contact unit 328, breaking the circuit through solenoid 29d and shutting oi? the radio. The latter then will remain turned off until the drum turns again, presenting another key to. the follower pin which closes contact; unit 328.

Although in all of the above described embodiments the surface irregularities have been illustrated as depressions adapted to receive the ends oiv the follower pins, it will be apparent that they also may comprise surface irregularities of other forms, such as. for example, elevations. Thus as- 17 is illustrated in Figure 18, a key 340 may have on its surface one or more projections 34 l. Associated with the key are a plurality of follower pins 342 adapted to be held against the key under a slight tension. When a projection on a key is aligned with one of the pins, it will elevate it as the drum rotates, and this motion may be used to operate a cooperating switch placed above the follower pin, either breaking or making a circuit to operate the circuit selecting mechanism as set forth above.

, 6. OPERATION The operation of all of the above described embodiments of our invention is fundamentally similar. First the desired schedule is set up on the core or body member. This is accomplished by setting the indicating dial at a given time period. Next the control handle 35 is turned to the desired station. Next the arm setting handle 95 is turned, thus adjusting the arms and moving the key corresponding to that particular time until a recess therein is opposite the follower pin controlling the switch which will energize the appropriate circuit. Next the indicator dial is turned to the subsequent time interval and the above procedure followed, setting the setting dial at any desired station. This sequence is repeated until all of the keys, or as many as are desired, have been set.

I The indicator dial, and the drum attached thereto, then are returned to their original position which should correspond to the time shown by the clock 96. As the latter runs, its hour shaft will turn the two-lobe cam I which, at fifteenminute intervals, will energize the circuit including the motor H0. The latter will run for a time interval determined by the single lobe cam lid and, while running, will advance both the indi- Gator dial and'the drum to the next time period. In so doing, it will present another key to the group of follower pins, one of which may drop into a recess in the key and thus close another circuit and tune in a corresponding station. If none of the recesses on the key registers with the pins, i. e. when the key is in a position such as to break the contact at the cancel unit I45, the radio will be shut off and will remain shut off until it is turned on again by a subsequent stepwise rotation of the drum.

- When it is desired to make a new setting for a given time interval without disturbing the operation of the radio, the operating switch W5 is disconnected and set switch I69 connected. This may be done in a single operation since both switch I54 and switch I69 may be tied together and operated by a single control. The indicating dial then is turned to the desired time interval, the station selecting knob turned to the appropriate station, and the setting handle 95 turned to adjust the key. The indicating dial then is turned back to its original position, the set switch opened, and the operating switch c1osed. Then as the drum continues its rotation, the operation of the unit will be governed by the new setting made.

When it is desired to cancel all of the settings on the drum in order to set up an entire day's radio program, the operating switch is opened and the set switch closed as indicated above. Then the cancelling lever is actuated, this moving the disc 98 which shifts all of the keys to the cancel position in which none of the circuits will be energized upon rotation of the drum and the radio circuit will be broken. Then each of the individual keys, or as many as desired, may

18 be set up on the drum in the manner indicated above.

When it is desired to dispense altogether with the selecting mechanism and to operate the radio manually, this may be done by moving the set handle to the manual position. This has the effect of shifting the position of the variable position stop 65 until the projection on the end thereof engages the multiple contact switch I12 in such a manner as to energize the manual position of the motor selector switch 156 which will actuate motor i5! correspondingly and set the multiple contact switches I58 and [59 on their manual positions. When thus set, the radio may be operated manually until the selecting mechanism again is cut in in the manner outlined above.

Thus it will be apparent that by means of our invention we are able to select and actuate any one of a plurality of electric circuits at predetermined time intervals. We also are able to control the operation of a radio automatically so that preselected programs may be turned in at selected intervals during the 24-hour day and, if desired, repeated automatically from day to day. Our selecting mechanism may be set rapidly and easily to follow the desired schedule, and may be changed from time to time without disturbing the operation of the device. Any one or all of the selected settings may easily be cancelled. Furthermore, all of the various advantages are obtained by means of a control device which is simple in construction and operation and which may be applied either in the construction of new radio units or adapted for application to radio units already in use.

Having now described our invention in preferred embodiments, we claim as new and desire to rotect by Letters Patent:

1. A device for automatically tuning a radio in accordance with a preselected schedule, said device comprising a rotatably mounted drum having in the surface thereof a plurality of guideways aligned with the axis of the drum, a plurality of keys slidably mounted one within each of the guideways, each key having a surface area of irregular configuration as it nests within the guideway in the drum, a pair of arms adapted to engage the ends of the keys, lever means for actuating the arms in opposite directions, a variable position stop associated with the lever means for arresting the motion of the arms at predetermined positions, thereby setting the keys at corresponding positions in the drum, a plurality of electric contacts positioned adjacent the drum, a plurality of pins arranged between the electric contacts and the drum and adapted to be actuated by the surface irregularities on the keys, thereby making and breaking an electric circuit through the contacts, and means associated with the contacts for moving the drum in stages according to the preselected schedule, thereby tuning the radio.

2. In a device for automatically tuning a radio by energizing a selected one of a plurality of electric circuits, the combination comprising a plurality of contact units, one being included in each of the circuits to be energized, a rotatable drum, a plurality of keys slidably mounted at spaced intervals on the periphery of the drum and having irregularities on the surface thereof, and setting means for adjusting the keys on the drum in a position calculated to close a selected one of the contact units, the setting means comprising a pair of arms adapted to engage the ends 19 of the keys from opposite directions, lever means for actuating the arms, and a variable position stop associated with the lever means and adapted to arrest the motion of the arms at the selected position.

3. A control device for controlling the operation of a responsive device in accordance with a preselected time schedule, said control device comprising a body member, a plurality of keys mounted for longitudinal movement on the body member, the keys having surface areas of irregular configuration, a pair of arms adapted to engage the ends of the individual keys, lever means for moving the arms in opposite directions, stop means for arresting the motion of the lever arms in a predetermined position, thereby stationing the engaged key at a corresponding position, electric contact means adapted to be actuated by the surface irregularities on the keys and to actuate in turn the responsive device, and. motor means for moving the body member according to the preselected time schedule, thereby changing the relative positions of the contact means and the keys and changing correspondingly the setting of the said responsive device.

4. A control device for controlling the operation of-a responsive device in accordance with a preselected time schedule, said control device comprising a body member, a plurality of keys mounted for longitudinal movement on the body member, the keys having surface areas of irregul'a'r configuration, a pair of arms adapted to engage the ends of the keys one key at a time, lever means for moving the arms in opposite directions, a variable position stop adjacent the lever means for arresting the motion of the same in a selected one of a plurality of predetermined positions, thereby stationing the engaged key in a corresponding position, electric contact means adapted to be actuated by the surface irregularities on the keys and to actuate in turn the responsive device, and motor means for moving the body member according to the preselected time schedule, thereby changing the relative positions of the contact means and the keys and changing correspondingly the setting of the said responsive device.

5. The control device of claim 4 wherein the variable position stop comprises a member having a plurality of faces, said member being eccentrically mounted on a rotatable shaft whereby to place a selected one of the faces in stop relationship to the lever means.

6. A control device for controlling the operation of responsive electrical apparatus in accordance with a preselected time schedule, said control device comprising a body member, a plurality of keys slidably mounted longitudinally on the body member, the keys having surface areas of irregular configuration, electric contact means adapted to be actuated by the surface irregularities on the keys and to actuate in turn the responsive apparatus, means for moving the body position of the keys on the body member, saidadjusting means comprising a rotatably mounted control shaft, a first arm for contacting one end of a selected key, first lever means interconnecting the control shaft and the first arm for moving the same toward and away from the key, a second arm adapted to contact th other end of the key, second lever means interconnecting the control shaft and the second arm for moving the same toward and away from the key, and a variable position stop adjacent the first lever means. rotation of the control shaft efiecting contact of the first lever means with the variable position stop thereby arresting the motion of the first arm, and continued rotation of the control shaft affecting the longitudinal displacement of the key by the second arm until it abuts the first arm, thereby stationing the key in a selected station relative to the electric contact means.

'7. A control device for controlling the operation of a responsive device in accordance with a preselected schedule, said control device comprising a body member, a plurality of keys having thereon a surface irregularity, said keysv being mounted for longitudinal movement on the body member, means for adjusting the position of the keys on the body member. a plurality of electric contacts spaced apart from the body member, a

lurality of pins disposed one between each of the contact members and the body member, the pins being displaceable by the surface irregularities on the keys, thereby operating the switches with which they are associated and actuating the responsive device, and means for moving the body member in accordance with the preselected time schedule, thereby changing the relative positions of the contact means and the keys and changing correspondingly the setting of the responsive device.

JAMES E. MORROW.

MARION T. EDWARDS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS preselected time 

